Australia's hidden silica crisis: Why nine common chemicals are still killing workers

Seven years is a long time to wait for a safety upgrade. In 2019, Safe Work Australia concluded that the legal limits for nine hazardous chemicals commonly used in Australian workplaces were too high. The data was unequivocal: the current limits did not protect workers from cancer, lung disease, or chronic organ damage.

The recommendation was simple: lower the permissible exposure limits to align with international best practice. Yet, as of March 2026, those recommendations are still sitting on a shelf. The national standards have not changed. Every day, thousands of Australians in the construction, manufacturing, and mining industries are exposed to levels of toxins that the government's own safety agency has declared unsafe.

The nine chemicals in question

The list includes some of the most dangerous substances in industrial use. Respirable crystalline silica is the most high-profile, found in everything from road base to kitchen benchtops. But the list also covers wood dust, hydrogen cyanide, and various chlorinated solvents used in dry cleaning and degreasing.

For silica, the proposed change was to drop the limit from 0.05 mg/m³ to 0.025 mg/m³. That might sound like a minor technical adjustment, but for a worker's lungs, it's the difference between a managed risk and a death sentence. Silicosis is progressive, irreversible, and entirely preventable.

Why the delay?

The roadblock isn't scientific; it's political. Since 2019, various industry groups have lobbied heavily against the changes. Their primary argument hasn't been that the chemicals are safe, but that measuring them at the lower levels is difficult and expensive.

Industry's objection isn't that the chemicals are safe. It's that the measurement technology doesn't exist. David Rynne from Cement Concrete and Aggregates Australia put it plainly: "If we can't measure it accurately, how do we know what compliance looks like, and how would an enforcement agency even enforce that very low level?" He's not saying the limit is wrong. He's saying it's unachievable.

That's where it gets complicated. New Zealand and Canada have already adopted the 0.025 mg/m³ silica limit. So either Australia's technology is somehow worse than New Zealand's, or the measurement argument is cover for something else — which is what union leaders suspect.

The cost of waiting

The Thoracic Society of Australia and New Zealand, representing chest and lung specialists across the country, has had enough. Professor Hubertus Jersmann, the Society's secretary and a doctor at the University of Adelaide, is blunt: "They're going about their work and then getting sick or dying from exposure. Exposure should ideally be zero. We cannot compromise if something causes cancer."

The medical community wants this resolved now. Cancer Council, Lung Foundation, and five other health organisations have signed a joint statement backing Safe Work Australia's recommendations. The Australian Council of Trade Unions has been even more direct. Liam O'Brien, the union confederation's assistant secretary, said: "If Safe Work Australia is telling us the current exposure settings are too high to keep workers safe, then any further delays would be unforgivable. Lowering these limits will save lives, and that should be a good enough reason to act now."

While the federal government stalls, the human toll is mounting. Silicosis is no longer a disease of the past; it is a burgeoning crisis among young tradies. The ban on engineered stone in several Australian states was a significant win, but it only addresses one source of silica. Without lower national exposure limits for all industries, the crisis will simply move from the kitchen showroom to the construction site and the mine pit.

The choice for the government in 2026 is clear. They can continue to listen to the measurement objections of the industry, or they can listen to the doctors who are treating the dying. Seven years is long enough to decide whose side they are on.